GradeGen

The stage at which the measured reaction is judged to be complete; here, it is the first sample in which iodine detects no starch.

Record the time of the first sample that leaves the iodine orange-brown. This is the measured endpoint: no starch was detected in that sample.

A clearly defined observation used to decide when a reaction or process has reached a chosen stage.

The measurement might be a loss of mass, a change in pH or the time taken to reach a fixed endpoint.

A 30-second sampling interval limits the precision of the endpoint because starch may have disappeared at any time since the previous sample.

A shorter time means a faster rate only when every sample reaches the same defined endpoint.

The stage at which the measured reaction is judged to be complete; here, it is the first sample in which iodine detects no starch.

Record the time of the first sample that leaves the iodine orange-brown. This is the measured endpoint: no starch was detected in that sample.

A clearly defined observation used to decide when a reaction or process has reached a chosen stage.

The measurement might be a loss of mass, a change in pH or the time taken to reach a fixed endpoint.

A 30-second sampling interval limits the precision of the endpoint because starch may have disappeared at any time since the previous sample.

A shorter time means a faster rate only when every sample reaches the same defined endpoint.

Endpoint